Swapping transmissions? - Transmission Forum

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Swapping transmissions?
Monday, December 10, 2012 8:04 PM
I picked up a SUPER clean 2001 sunfire. It was so nice I couldn't turn it down even though it has a 3 speed transmission in it. Nothing wrong with that, other than I was shopping for a 4 speed auto or 5 speed to get max MPG.

Now that I have a 3 speed, can somebody tell me what I would have to do to swap in a 4 speed instead? It's a 2200 engine

Re: Swapping transmissions?
Sunday, December 16, 2012 4:26 AM
2200 4 speed auto or the older 2.2 4 speed. Pretty sure they are all the same tranny. 2000+ 4speed auto pcm, 2000+ 4 speed engine harness, then the 4 speed axles. I think the driver side is the same but not sure right off. You will have to look that up as this isn't a common swap. Also to note the converter may be different having a different stall speed. Also the shifter and shifter cable may be different. You would have to check those two things out as well.
Re: Swapping transmissions?
Sunday, December 16, 2012 5:59 AM
Sounds like a pretty big job. No motivation for changing it as long as the 3 speed is healthy, but if it ever goes it's something I would consider. I can't believe in 2001 GM was still selling cars without an overdrive, and people were buying them.
Re: Swapping transmissions?
Tuesday, December 18, 2012 2:16 AM
Not really that hard, the only thing added to it is the harness and computer. The rest is the same thing as pulling the transmission pretty much.
Re: Swapping transmissions?
Tuesday, December 18, 2012 5:59 AM
I notice the shifters on the 4 and 3 speeds are different. Do they function the same? I guess I would need to look into shift cables
Re: Swapping transmissions?
Tuesday, December 18, 2012 11:29 AM
mark Finley wrote:

I notice the shifters on the 4 and 3 speeds are different. Do they function the same? I guess I would need to look into shift cables



if you find a trans to fit your car, then you'll find the car to pull the trans, cluster, computer, shifter, mounts and cables from.



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